Quote:
Originally Posted by rjmorel
2LZ, a question for you that I've always wondered about. I'm basically a 2 stroke guy from the 70's and haven't fiddled much w 4 strokes.
Question is when you take top end apart how do you know when putting it back together to get the cam chain timed correctly so valves are not opening at wrong time? Are there marks on chain and cam? What about where it goes on crankshaft end? thanks rj
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I'm an old two stroke guy too!...and man were they faster! My 250 Husky would absolutely smoke the RX3 or our TT. No comparison....and far easier to work on.
Back to the NC250. I tore it apart on TDC. I used the zip tie trick on the chain so it wouldn't get lost in the case when I pulled the cam.
Upon reassembly, I made sure the crank was still on "T" thru the lower peep hole, then set the cam so the two marks that you can see thru the top peep holes on the cam gear measured the same height off the rocker deck. The lobes will be poking down.
Then I crossed my fingers, installed the cam and remeasured to make sure they didn't move while I was fighting with the chain. You have to rotate the motor a little to pop the chain on. Tight fit. When I rotated it back, it all lined up.